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US3751624A Expired / Lapsed US ⏱️ 0.0 years remaining

Butt brazing apparatus and method

Assignee: International Business Machines Corp
•
Filing: 1972-06-29
•
Granted: 1973-08-07
•
Expires: 1992-06-29
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Abstract

Abstract A metallic bonding system for butt-brazing miniature wires is provided which utilizes a small composite wire which includes a section of brazing material. The fine wire is to be butt-brazed to a pad member to form an electrical connection. A first conductive member forms a first electrode and a second conductive member forms a second electrode. Each of these electrodes contains a wire holding section for holding the small composite wire near one end thereof. A power supply is connected at one end of each of the first and second conductive members and a high resistance member is connected across the other end thereof. The power supply provides a controlled current pulse of sufficient duration to cause heating in the wire holding section to melt the insulation and contact the small composite wires, thereby completing a circuit through the small composite wires which heats up sufficiently to cause the brazing material section of the wire to form a braze between the end of the wire and the pad member.

Inventors

  • 👤 R Banks
  • 👤 N Gillespie
  • 👤 A Rzant

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 21:42
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0444; B; B23; B23K; B23K1/00; B23K1/0004

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 32 words
A metallic bonding system according to claim 1, wherein said small composite wire has a core of brazing material surrounded by an electrical conductor which is enclosed in a film of insulation.
Claim 2
Dependent Claim 34 words
A metallic bonding system according to claim 1, wherein said small composite wire has an electrical conductive wire core having a brazing material clad thereto and a coating of insulation covering said brazing material.
Claim 3
Dependent Claim 71 words
A metallic bonding system according to claim 1, wherein said first and second electrodes each comprise a thin electrically conductive wire formed into a U-shape having a flat bottom, the flat bottom of each U-shape electrode is turned toward one another so that the flat bottom of each U-shaped electrode is parallel to one another, said flat bottom of each U-shaped electrode comprising one of said high resistance wire holding means.
Claim 4
Dependent Claim 57 words
A metallic bonding system according to claim 1, wherein each of said high resistance wire holding means consists of a high resistance conductive wire connected into said first and second electrodes, respectively said high resistance wire holding sections being electrically energized by said power supply means through said electrodes and said high resistance member connecting said electrodes.
Claim 5
Dependent Claim 127 words
A metallic bonding system according to claim 1, wherein said first conductive member comprises a first pair of half cylindrical members and said second conductive member comprises a second pair of half cylindrical members, means for insulating said half cylindrical members in each pair from one another, said high resistance wire holding section comprising an electrical conductive member connected across said insulation between half cylindrical members of each pair, said first and second pair of half cylindrical members being formed from a first cylindrical electrode and a second cylindrical electrode which fits inside said first cylindrical electrode, insulation is located between said first and second cylinders, said first and second cylindrical electrodes being cut along the common diameter to form said first and second half cylindrical members.
Claim 6
Dependent Claim 72 words
A metallic bonding system according to claim 6, wherein said high resistance member connected across the other ends of each of said first and second conductive elements is connected across the inner half cylindrical member of each of said first and second pair of half cylindrical members and said power supply means is connected across the outer half cylindrical members to complete the circuit through said high resistance holding means in series.

References Cited (Backward Citations)

US3126619A Cited
US2953673A Cited
US3263059A Cited
US3384958A Cited
US3320661A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-08-06 1977-02-05 1977-08-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-08-06 1981-02-05 1981-08-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-08-06 1985-02-05 1985-08-07 $7700.00 Window Closed / Lapsed

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